 The Martian meteorite ALHA 77005 was collected in 1977 at Allan Hills, while ALH 84001 was collected on the Allan Hills Far Western Icefield during the 1984–85 season.Allan Hills are in the shape of the letter "Y", with the open end pointing roughly northwards, and encompassing the Shimmering Icefield.The southern end of the Y starts at Ballance Peak and proceeds northward, encompassing the Feistmantel Valley and Mount Watters, before it splits into the northwest Tilman Ridge and the northeast Shipton Ridge.